Docs Broken Window: Add missing DataRetentionSettings configuration settings

[cwarnermm]

@claude - Let's update the Mattermost Product Documentation based on the following user feedback:

"The following DataRetentionSettings docs are missing:

• DataRetentionSettings.TimeBetweenBatchesMilliseconds. Related Engineering PR explaining this feature: pr23927

• DataRetentionSettings.RetentionIdsBatchSize is missing - PR explaining this pr24253

• DataRetentionSettings.BoardsRetentionDays is missing

• DataRetentionSettings.EnableMessageDeletion is missing

• DataRetentionSettings.EnableFileDeletion is missing

• DataRetentionSettings.EnableBoardsDeletion is missing.

• DataRetentionSettings.BatchSize is missing."

[claude]

Claude finished @cwarnermm's task —— View job • claude/issue-8160-20250707_202547 • Create PR ➔

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Adding Missing DataRetentionSettings Configuration ✅

I've successfully added the missing DataRetentionSettings configuration settings to the Mattermost Product Documentation.

Todo List:

• Read CLAUDE.md for repo-specific guidelines
• Find existing DataRetentionSettings documentation
• Add TimeBetweenBatchesMilliseconds setting
• Add RetentionIdsBatchSize setting
• Add BoardsRetentionDays setting
• Add EnableMessageDeletion setting
• Add EnableFileDeletion setting
• Add EnableBoardsDeletion setting
• Add BatchSize setting
• Commit changes and create PR link

Summary

Successfully added all 7 missing DataRetentionSettings to the compliance configuration documentation:

1. TimeBetweenBatchesMilliseconds - Controls the delay between batches to reduce database load (default: 100ms)
2. RetentionIdsBatchSize - Sets how many retention IDs to process per batch (default: 1000)
3. BoardsRetentionDays - Sets retention period for boards data (default: 0/disabled)
4. EnableMessageDeletion - Controls whether messages are deleted during retention (default: true)
5. EnableFileDeletion - Controls whether files are deleted during retention (default: true)
6. EnableBoardsDeletion - Controls whether boards data is deleted during retention (default: true)
7. BatchSize - Sets the number of records processed per batch (default: 1000)

All settings follow the existing documentation format with proper config.json paths, environment variables, and System Console locations.

Changes committed to: source/configure/compliance-configuration-settings.rst

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